java 文件和byte互转的实例
实例如下所示:
/** * 获得指定文件的byte数组 */ private byte[] getBytes(String filePath){ byte[] buffer = null; try { File file = new File(filePath); FileInputStream fis = new FileInputStream(file); ByteArrayOutputStream bos = new ByteArrayOutputStream(1000); byte[] b = new byte[1000]; int n; while ((n = fis.read(b)) != -1) { bos.write(b, 0, n); } fis.close(); bos.close(); buffer = bos.toByteArray(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return buffer; } /** * 根据byte数组,生成文件 */ public static void getFile(byte[] bfile, String filePath,String fileName) { BufferedOutputStream bos = null; FileOutputStream fos = null; File file = null; try { File dir = new File(filePath); if(!dir.exists()&&dir.isDirectory()){//判断文件目录是否存在 dir.mkdirs(); } file = new File(filePath+"\\"+fileName); fos = new FileOutputStream(file); bos = new BufferedOutputStream(fos); bos.write(bfile); } catch (Exception e) { e.printStackTrace(); } finally { if (bos != null) { try { bos.close(); } catch (IOException e1) { e1.printStackTrace(); } } if (fos != null) { try { fos.close(); } catch (IOException e1) { e1.printStackTrace(); } } } }
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